Application-layer anycasting: a server selection architecture and use in a replicated Web service

摘要: Server replication improves the ability of a service to handle large number clients. One important factors in efficient utilization replicated servers is direct client requests "best" server, according some optimality criteria. In anycasting communication paradigm, sender communicates with receiver chosen from an anycast group equivalent receivers. As such, well suited problem directing clients servers. This paper examines definition and support paradigm at application-layer, providing that uses resolver map domain name selection criteria into IP address. By realizing we achieve flexibility optimization ease deployment service. case study, examine performance our system for key service: Web To this end, develop approach estimating response time will experience when accessing given Such information maintained query obtain identity server best estimated time. Our collection technique combines push probes estimate expected without undue overhead. experiments show selecting using architecture estimation can improve by factor two over nearest four random selection.